Category: Swarm

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Earthquake swarm on TFZ

Today (24-February-2014) at 06:49 UTC an earthquake swarm started on TFZ. Largest earthquake in this swarm had the magnitude of 3,0. No other earthquake has so far been larger.

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The earthquake swarm in TFZ. It is aligned in north-south direction. Copyright of this image belongs to Icelandic Meteorological Office.

It is possible to monitor for earthquakes here with 5 minute delay. The activity appears most clearly on Böðvarshólar and Bjarghús geophone stations. This appears to be an continued activity from the earthquake swarm that started back in October 2012. I am expecting more earthquakes in the area since I don’t expect this activity to be over yet. Quiet times between earthquake activity should be expected. For some unknown reason that is how this area behaves and it is not known why that is.

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Minor earthquake swarm in Katla volcano

Over the past two days minor earthquakes have been taking place in Katla volcano. This is just minor earthquake activity. None of the earthquakes so far have reached the magnitude 1,0 that I know of.

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Earthquake activity in Katla volcano. Copyright of this image belongs to Icelandic Meteorological Office.

What is interesting about this earthquake activity is that it is taking place inside the caldera of Katla volcano and it is taking place in high winter. When earthquake activity is normally low. What this means is unknown as is and I do not think an eruption is imminent in Katla volcano. This activity is however something to keep an eye on. Since Katla volcano is known to have erupted as early in May. Last such eruption took place in the year 1721 and lasted until October that same year (+-45 days). It is not known if eruptions can take place earlier, I am not going to rule it out even if it is not documented in historical documents about past eruptions in Katla volcano.

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Minor earthquake swarm in Hengill volcano

Yesterday (16-February-2014) an minor earthquake swarm took place in Hengill volcano. This earthquake swarm took place because Orkuveit Reykjavíkur (OR) was pumping down water from hydrothermal processing in this part of Hengill volcano.

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The earthquake swarm in Hengill volcano yesterday. Copyright of this image belongs to Icelandic Meteorological Office.

This type of earthquakes happen regularly when Orkuveita Reykjavíkur pumps water down into the ground at this location. At the moment this is just making minor earthquakes. This type of earthquake swarm only last during the period when water is being pumped down into the ground. Once that process is stopped the earthquake activity stops almost immediately.

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Minor earthquake swarm in Geysir volcano and Presthjúkar volcano

Yesterday (05-February-2014) an minor earthquake swarm took place in Geysir volcano (no GVP information) and in Presthnjúkar volcano. None of the earthquakes where above the magnitude of 2,6. The largest earthquakes did appear on my geophone network and were (are for the next few hours when this is written) visible on my webicorders website.

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Earthquake activity in Presthnjúkar volcano and Geysir volcano. Copyright of this image belongs to Icelandic Meteorological Office.

Other than this minor earthquake swarm it remains quiet in Iceland. I am not sure why that is at current time. This is the longest quiet period that I remember for the past 5 years at least.

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Two earthquakes on the Reykjanes ridge on 10-January-2014

I am sorry for this late post of this events. I have been having computer problems and more then just one computer problem. More on that in next post.

On the Friday the 10-January-2014 three earthquakes took place on the Reykjanes Ridge. There magnitudes where 3,1 and 3,5. The third earthquake had the magnitude of 2,5.

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The earthquakes on the Reykjanes ridge on the 10-January-2014. Copyright of this image belongs to Icelandic Meteorological Office.

This where tectonic earthquakes and nothing suggests that they where connected to any magma movements in this area of the Reykjanes ridge.

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Magnitude 3,5 earthquake on the Reykjanes peninsula

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Today (7-January-2014) at 12:11 UTC an magnitude 3,5 earthquake took place on the Reykjanes Peninsula. This earthquake was part of an swarm that has been taking place in this area of Reykjanes peninsula for past two weeks.

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The earthquake swarm on the Reykjanes peninsula. Copyright of this image belongs to Icelandic Meteorological Office.

I am not sure how this earthquake swarm is going to evolve, but there is a risk of more earthquakes in this area. But most of them are going to be minor, or less then 3,0 in magnitude.

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Earthquake swarm in Hveravellir

During the night of 6-January-2014 an earthquake swarm started in Langjökull volcano, the northern one. The nearby area is known as Hveravellir geothermal area. So far this has just been a minor earthquake swarm. With largest earthquakes not exceeding magnitude 2,0 at the moment.

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The earthquake swarm in Hveravellir geothermal area. Copyright of this image belongs to Icelandic Meteorological Office.

The tremor plot of nearby SIL station shows that more earthquake activity is taking place then appears on Icelandic Meteorological Office website. This are then earthquake that are too small to be detected by other nearby SIL stations.

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The earthquake activity at Hveravellir SIL station. Copyright of this image belongs to Icelandic Meteorological Office.

I do expect this earthquake activity to continue for some time now. It is impossible to know for sure if this activity is going to increase or not.

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Minor earthquake swarm on Reykjanes peninsula

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Yesterday (31-December-2013) an earthquake swarm took place on Reykjanes peninsula. This was an minor earthquake swarm with largest earthquakes having the magnitude of 2,5. The depth of this earthquake swarm was around 5 km.

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The earthquake swarm on the Reykjanes peninsula. Copyright of this image belongs to Icelandic Meteorological Office.

This earthquake swarm took place close to a mountain named Fagradalsfjall. I do not know (or remember) if this a cinder cone or some other type of volcano in this area. More details of this earthquake can be found here on Icelandic Meteorological Office website.

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Earthquake activity in Esjufjöll and Kverkfjöll volcanoes

Earthquake activity started again in Esjufjöll volcano today (20-Desember-2013). The largest earthquake had the magnitude of 2,9 and had the depth of 5,0 km. So far only two earthquakes have been recorded, but it is not uncommon that earthquake activity in Esjufjöll volcano starts slow before it picks up. Earthquake activity remains low in Esjufjöll volcano, but there is now more earthquake activity in Esjufjöll volcano for the past few years then in past several decades (perhaps, recording is missing in the past)

Kverkfjöll volcano

Earthquake activity continued in Kverkfjöll volcano today. None of the earthquake did reach the magnitude of 3,0. The largest earthquake had the magnitude of 2,0 and the depth of 5,3 km.

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Earthquake activity in Esjufjöll volcano and Kverkfjöll volcano. Copyright of this image belongs to Icelandic Meteorological Office.

I am expecting more earthquake activity in Kverkfjöll volcano. But I expect it to remain small as it currently is at least I do not expect any earthquake above the magnitude of 3,0 to take place as is.

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Earthquake swarm in Hengill volcano

A earthquake swarm of minor earthquakes took place in Hengill volcano today. This earthquake swarm was due to Orkuveita Reykjavíkur was pumping down water in the area.

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The earthquake swarm in Hengill volcano this evening. Copyright of this image belongs to Icelandic Meteorological Office.

The largest earthquake had the magnitude of 1,4. Other earthquakes were smaller.

Continued earthquake activity north of Kolbeinsey Island

During the week the earthquake activity continued north of Kolbeinsey Island. Two more earthquakes appeared, they had the magnitude of 3,0 and 3,1 according to EMSC. I do not have any image of that activity since I was travelling the days it was on Icelandic Meteorological Office website.

Webicorder images still do not update

Something failed in my hardware few days ago so no webicorder images are updating at the moment. I do not know what did go wrong or what did fail and it is going to be few weeks until I know why. According to electronic usage readings from my home something powered down or was powered down (I know what normal usage should be based on what electronics where turned on when I left). I am not sure what was turned off or did go offline and I won’t find out until I get back home. Until then my webicorder images are not going to be updated. International webicorders are updating (mostly) normal now and all large earthquake activity in the world is going to appear on that website. I do not run any of the images shown there so they are unaffected by this failure.

Donations

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